Laser sensor system scans railway tracks
August 18, 2014 // Christoph Hammerschmidt
To keep the track infrastructure safe, railway operators need to acquire many track parameters in regular intervals. Irregularities in the rail geometry can cause sudden cracks in the steel rails since these are under high tensions. These cracks in turn can initiate domino effects with rails and railway sleepers tearing over large stretches. An innovative optical sensor system surveys the tracks quickly and safely. A laser scanner acquires geometrical irregularities and transforms them into 3D images.
Today the state of the art in surveying a railway track infrastructure is camera-based systems. These systems however have a number of drawbacks: The quality of the results heavily depends on the lighting conditions, and they require a rather complex processing of image data. In addition, the image data are demanding a very large memory space.
In its Rail Track Scanner (RTS), Fraunhofer IPM for the first time utilises a laser scanner to measure rails, railheads, sleepers and rail bed. The specific optical design allows the scanner to be mounted just 1.2 meters above the rail bed. The device scans the tracks transversely to the measurement vehicle movement at a track width of some 1.7 metres. With up to 2 million single measurements per second, the instrument generates up to 800 profiles, providing a detailed three-dimensional image of the tracks and the infrastructure that is associated directly to it. Out of the cluster of points generated, appropriate algorithms extract parameters such as distance, height and tilt of the rails as well as the exact geometry of the railheads. These parameters then are compared with set values. The scan frequency can be adapted to the respective task. Topographic structures and deviations are identified at an exactness of less than 1 mm.
The scanner has the size of a shoebox and thus can be mounted to any rail vehicle. Thus, the RTS offers a cost-effective option to automatically survey the rail infrastructure without the need to acquire a specific measurement vehicle. Utilising an eye-safe infrared laser (class I), the scanner can be deployed in the public space without any restrictions. The instrument, which will be introduced to the public at the Innotrans trade fair in September, will be utilised by Swiss mobile mapping services company iNovitas to survey narrow-gauge lines in Switzerland.All news
RS Components and Allied Electronics connect with Rosenberger for global distribution
October 24, 2014
RS Components (RS) and Allied Electronics, the trading brands of Electrocomponents plc, have signed a global distribution ...
Pixel chip sparks energy-efficient intelligent LED headlamps
Noise cancellation: The sounds of silence in the car
HPLEDs double light output, cut costs by 40 percent
Startup creates virtual cores
Photochemical compounds for tunable OLED devices
October 24, 2014
Spanish researchers have developed new organic compounds characterized by a higher modularity, stability and efficiency, ...
Consumer chips in the car? Experts demand adequate design processes
Murata cheerleaders demonstrate sensors, swarm intelligence
Radon and VOCs detection goes personal
- 5 Best Practices for Designing Flexible Test Stations
- Intelligent PLCs Expand the Internet of Things
- Solutions for Millimeter Wave Wireless Backhaul
- Enter Linduino
InterviewCEO interview: AMS' Laney on driving a sensor-driven business
Kirk Laney, CEO of Austrian mixed-signal chip and sensor company AMS, wants to leverage the opportunity that technology affords to create new markets for sensors and sensor interfaces.
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.